Self Adhesive Vinyl (Printing Materials, Outdoor Advertising Material, Car Stickers)Sanyi Self Adhesive Vinyl is an opaque Polymeric vinyl with AIR-FREE technology. It also features a long-term durability for 3-5 years and a highly cohesive acrylic pressure-sensitive adhesive that is protected with a high quality siliconized liner. AIR-FREE technology allows trapped air to be released during application. AIR-FREE is a kind of particular technology that utilizes embossing patterns on the release liner, making it easier to remove trapped bubbles and increasing overall efficiency and productivity.